public function get_account_by_id( $account_id ) {
		// Get an account and decrypt the PII.
		$account = get_option( $this->single_account_prefix . $account_id, [] );
		foreach ( $account as $field_key => $value ) {
			if ( ! array_key_exists( $field_key, $this->encrypted_fields ) ) {
				continue;
			}

			$account[ $field_key ] = $this->encryption->decrypt( $value, $this->encrypted_fields[ $field_key ] );
		}

		return $account;
	}